Add support for Amonkhet Mechanics

and fix some cards.
Added exerted trigger, event and add removemc keyword inside transforms
ability so we can soft code Embalm and Eternalize...

projects/mtg/src/WEvent.cpp

@@ -121,6 +121,11 @@ WEventCardUpdate(card)
 {
 }
 
+WEventCardExerted::WEventCardExerted(MTGCardInstance * card) :
+WEventCardUpdate(card)
+{
+}
+
 WEventVampire::WEventVampire(MTGCardInstance * card,MTGCardInstance * source,MTGCardInstance * victem) :
     WEventCardUpdate(card),source(source),victem(victem)
 {
@@ -377,6 +382,12 @@ Targetable * WEventCardCycle::getTarget(int target)
     return NULL;
 }
 
+Targetable * WEventCardExerted::getTarget(int target)
+{
+    if (target) return card;
+    return NULL;
+}
+
 Targetable * WEventCardAttackedNotBlocked::getTarget(int target)
 {
     if (target) return card;